Koodo uses WCDMA frequencies 850 and 1900 so this phone will work but not in all areas since it only supports the one frequency and not the other. I would not recommend buying this phone to use on Koodo's network.

Like I said you'll have very spotty service anywhere in Canada on Koodo's network with that phone and have more issues probably then it's worth. I'd check out the Alcatel one touch idol X+ Koodo sells since it's very comparable in specs and price and best of all it will work 100% on Koodo's network.
Also you could use the tab to get it even cheaper, actually for $0 on a medium Tab.

why choose this phone you ask. the price. it does everything a high end phone offers at a reasonable price. if this phone got wrecked or had an issue it could be discarded. according to my friends its as good as any name brand phone.